Some ideas? (http://x.laleeloo.com/tmp/living-room.jpg)

I assumed when you said 'tv cart' it was mobile so you could change the orientation to face whereever you wished to sit?

When I was in school I had my desk facing my patio doors and I found it very restorative to be able to see outside.

I faced the chair and futon to each other for conversations? I'd probably add a round carpet to tie those two together as a little area?

I like using bookshelves back to back to create false 'walls' or room dividers butI am not sure of the stability of your shelves?

Anyhow! I hope you find some sort of idea for this?
=D